The rear brake plates are the original magnesium racing items.
The sprocket is a lightened item and will be left. The original finned drums disappeared when the bike was in bits ‘n’ pieces many years ago – it is suggested that someone who went to look at the project took them away with them as they were a desirable upgrade over standard road-going unfinned items. Drums fitted to the rear differ in that one is drilled to prevent water build-up. Shoes are good with plenty of material. No bearing seals were fitted but there was no grease contamination present.